I had a NTC 350 BCIV that use to do that to me. One time it stopped on the middle of Hoover Dam, I had to get out, jack up the cab and set it on manual.After $1500 worth of shop time and useless parts, it would still do it at the worst times.I finally sold the truck and it's still on the road, doing the same thing.Experience tells me that he should set it on manual and go home with it.If there aren't any major oil or temp problems, he'll be fine.One thing that does come to mind is that the fuel solenoid could be bad and causing it to lose connection which will shut it down. Possibly caused by broken wiring or a bad ground. It the solenoid was put in with teflon tape it can't get a good ground and may be losing it there.Try jumpering it through the switch so that it's active when the switch is on, but isn't being affected by the shutdown sensors. If it still shuts down then it's either witing, the solenoid or the gound.

YMMVDon't Try This At HomeProfessional Driver on a Closed Course.Tax, Title and License Extra.I'm not a mechanic, but I did stay at a Holiday Inn Express.

BK,He has a computor running the vital systems and a custom dash board with a 17" toutch screen monitor that is his only vision of any guages.He is now on the road and half way back to V.A.I'll let you know what he finds.Thanks again.Nick.P.S. I'm leaving today for Columbus for paint, I hope I don't need to call upon you, but I hope I can if I need to!